import java.util.concurrent.TimeUnit;

class HoldLockThread implements Runnable
{
    private String lockA;
    private String lockB;

    public HoldLockThread(String lockA, String lockB) {
        this.lockA = lockA;
        this.lockB = lockB;
    }

    @Override
    public void run() {
        synchronized (lockA)
        {
            System.out.println(Thread.currentThread().getName()+"\t 自己持有："+lockA+"尝试获得:"+lockB);
            try {
                TimeUnit.SECONDS.sleep(2);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            synchronized (lockB)
            {
                System.out.println(Thread.currentThread().getName()+"\t 自己持有："+lockB+"尝试获得:"+lockA);
            }
        }
    }
}

public class DeadLockDemo {
    public static void main(String[] args) {
        String lockA="lockA";
        String lockB="lockB";
        new Thread(new HoldLockThread(lockA,lockB),"AAA").start();
        new Thread(new HoldLockThread(lockB,lockA),"BBB").start();
        /*
        * linux     ps-el|grep xxxx
        * window下的java运行程序 也有类似ps的查看进程命令，但是我们目前需要查看的只是java
        * jps = java ps
        * */
    }
}
